Reference state of the power plant

The use of modern computer codes requires preparation of detailed input data. This effort involves not only selecting the appropriate information from the documents on design and operation and the other documents pertaining to a particular power plant, but also performing preliminary analyses. This is especially the case when defining the reference neutronic state of the core. 

In general, the input data for a computational model of an RBMK plant are comprised of the following  

The methodology for accident analysis should include identification of the initiating event and the subsequent scenarios and selection of conservative initial and boundary conditions (Section 6). 

When considering scenarios for DBAs, including transients with additional equipment failures, the following aspects need to be taken into account  

The initial and boundary conditions for analysis can be adopted on the basis of either a realistic approach or a conservative approach. The choice is made within the range of possible values depending on the operating mode and on the ranges of the parameters in question. Such ranges may include technological tolerances, calculation and/or measurement errors. 

---